Introverted Feeling: Valuing; considering importance and worth; reviewing for incongruity; evaluating something based on the truths on which it is based; clarifying values to achieve accord; deciding if something is of significance and worth standing up for. Evaluating whether you like an outfit or not: “This outfit suits me and feels right.”
Somewhat of an example, but not quite what it does for someone that leads with it.
The Fi ride of doom would be when you don't want to face reality and the real situation at hand, and getting stuck in a rut of feelings?
Fi: "This is good, that is bad"
Ni: "But what about from this perspective?"
Fi: "So this is bad and that is good?"
Ni: "Well maybe from that perspective it is but have you considered all these other perspectives?"